From the hipster at a 1940s bridge opening to the woman with a cell phone in a 1928 Chaplin film, some photographs contain figures that seem impossibly out of place. We're counting down seven of the most baffling cases where modern people appear to have been caught in the past—complete with the evidence and theories that might explain them.

In August 1901, two respected English academics took a wrong turn in the gardens of Versailles and found themselves surrounded by people in 18th-century dress. What began as a strange afternoon walk turned into one of history's most detailed and controversial time slip cases, complete with decades of research, multiple witnesses, and evidence that still divides historians today.

In 1889, Mark Twain sent a Connecticut Yankee backward to King Arthur's court. In 1895, H.G. Wells launched his Time Traveller 800,000 years into the future. These two literary giants created the blueprint for every time travel story that followed—but their visions couldn't have been more different. We explore how their contrasting approaches still shape how we imagine moving through time today.

From ancient batteries to impossibly precise mechanisms, history is littered with objects that seem wildly out of place in their time periods. We're counting down five authenticated artifacts that have stumped scientists and historians—objects so advanced for their era that some wonder if they're evidence of time travelers leaving traces in the past.

In the year 2000, someone calling themselves John Titor appeared on internet forums claiming to be a soldier from 2036 sent back to retrieve an IBM 5100 computer. For five months, he posted detailed descriptions of time travel mechanics, future events, and even uploaded technical diagrams of his time machine before disappearing without a trace. We unravel every thread of the most compelling time traveler story ever told—and investigate whether it might actually be true.